Things like climbing (which I also do) don't have automatic trackers, and tracking food intake is just too cumbersome these days for me to even try and keep up with that.
If there were better ways to automate these things and better APIs available to pull these things in automatically, I'd totally build something like this. I just don't have the time, inclination, or the energy to manually add the climbs, the calories, every food item, and myriad other things into the system.
So I'll say this: it's beautiful and full of very, very cool info. I just wouldn't do it myself unless I could generate all of that data. A handful of commits to build the site, and then let it update itself automatically via APIs. Granted, this means my site would be a bit less interesting, since the most interesting things on here are things you can't automatically track... but I'm working on plenty of other interesting things, and this just doesn't rate high enough on my list to do.
I'm jealous, though. Very well done.